RAE effect size increases linearly with relative age differences¶
Claim · All claims
Evidence · 1 study · quant-synthesisr?·q3
Currency · newest study 2009 · not yet checked against its sources · not reviewed by a person
Subclaims¶
Reading the evidence codes
q is the design tier, i the impact, n the sample, and the kind with its r
the rigour judged within that kind: what each code means.
This claim: no standardized effect is recorded in observations/ for it yet, so no benchmark reading is possible.
q3 i? Across the meta-analyzed samples, RAE magnitude increased linearly as relative age differences between athletes grew. → Cobley 2009
Evidence¶
Cobley 2009¶
Cobley, S., Baker, J., Wattie, N., McKenna, J. (2009). Annual Age-Grouping and Athlete Development. Sports Med 39, 235–256. https://doi.org/10.2165/00007256-200939030-00005
q3 · i? · quant-synthesis · r?
Follow-up analysis of the pooled odds-ratio estimates from the 253 independent samples reported that "Effect size increased linearly with relative age differences." No coefficient or effect-size value for the trend is printed in the available text.
"Overall results identified consistent prevalence of RAEs, but with small effect sizes. Effect size increased linearly with relative age differences."
Discussion¶
Learner Variables¶
- Age and Developmental Stage — predictor: learners who differ on it differ in outcomes
Related Claims¶
- RAEs are consistently prevalent across sports but with small effect sizes — related
- Age category, skill level and sport context moderate RAE magnitude — related
- Adolescent males at representative level in highly popular sports are most at risk of RAE inequalities — related
- RAE mechanisms and generalization to female and culturally diverse contexts remain unconfirmed research needs — related
Page metadata
| Field | Value |
|---|---|
type |
claim |
id |
rae-effect-size-increases-with-relative-age-difference |
title |
RAE effect size increases linearly with relative age differences |
description |
RAE effect size increases linearly with relative age differences |
status |
review |
evidence_strength |
moderate |
newest_evidence |
2009 |
generated |
by process:wiki-ingest on 2026-10-14 |
trust |
unverified — no one has confirmed this page's content |
sources |
1 — cobley-2009 |
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